Picture above informing that the respondents age 1 year of 48% have protective ant-HBs titer. Furthermore children age 2 years until the age of 4 amounted to 41%. But at the age of 5 years old tend to be decreased to 39%, until at the age of 10 years, only 13% of children who have anti HBs protective. At this time that children need to get booster immunization Hepatitis. After 11 years of infection HBV occurs naturally and the percentage of children with anti-HBs protective began to increase.
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